How severe is CVE-2001-1507?

CVE-2001-1507 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-1507 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1507?

CVE-2001-1507 primarily affects Openbsd Openssh. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-1507?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2001-1507 published?

CVE-2001-1507 was published on 2001-12-31 and last updated on 2026-06-16.

CVE-2001-1507

CVE-2001-1507 is a high-severity vulnerability in Openbsd Openssh with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openbsd Openssh
Published: 2001-12-31
Last modified: 2026-06-16

Description

OpenSSH before 3.0.1 with Kerberos V enabled does not properly authenticate users, which could allow remote attackers to login unchallenged.

Frequently asked questions

What is CVE-2001-1507?: OpenSSH before 3.0.1 with Kerberos V enabled does not properly authenticate users, which could allow remote attackers to login unchallenged.
How severe is CVE-2001-1507?: CVE-2001-1507 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-1507 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1507?: CVE-2001-1507 primarily affects Openbsd Openssh. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1507?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2001-1507 published?: CVE-2001-1507 was published on 2001-12-31 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:openbsd:openssh:3.0:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:3.0p1:*:*:*:*:*:*:*

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